Flex-O-Vent is our most economical polyester-based ventilation product. Available in 10-foot and 20-foot rolls and multiple packaging options, Flex-O-Vent won’t absorb moisture, which can freeze and block all ventilation. It features M63 Marco proprietary adhesive for superior hold, easy one-person installation and a 40-year limited warranty.
Our Flex-O-Vent Universal Venting Material vents, protects and lasts like no other. While polyurethane products constantly expand (as they soak up water) and contract (as they dry out), causing them to disintegrate and fail, Flex-O-Vent offers 40 years of Weather-Tite™ performance. Its specially formulated polyester—manufactured from recycled material—prevents moisture absorption and holds together to keep out pests. It’s also extremely durable, flame resistant, clog resistant, and tear resistant.
Overall
Net Free Area: 23 sq. in. for 1” free-standing product*
1- 1/2” x 3” x 10’: Rib heights up to 1-1/4”
1- 1/2” x 2” x 10’: Rib heights up to 1-1/4”
1” x 3” x 10’: Rib heights up to 3/4”
1” x 2” x 10’: Rib heights up to 3/4”
Air Permeability: >760 cubic feet per minute
Cold Cracking: -55˚C (-130˚F)
Tear Strength: 3.5 ppi
Tensile Strength: 16 psi – Elongation 175%
Compressive Strength: 1.8 psi at 75%
Abrasion: No Damage
*Effective Net Free Area varies based on product height, panel profile, and installation methods.
With Flex-O-Vent, one size fits most panels. Installation is a simple two-step process easily handled by one installer. Flex-O-Vent comes in easy-to-handle 10-foot rolls (mirroring most ridge cap lengths) or larger 20-foot rolls if you prefer. It is easily cut with scissors or a utility knife, and a double bead of M63 adhesive holds Flex-O-Vent securely in place until the ridge cap is installed.
Calculate the exact amount of ventilation needed for a well-balanced system.
